Telephone transmitter silencer



July 14, 193.1. i JfEfsTE'lNBERG TELEPH'NE TRANMITTER SILENCER v FiledJuly 28, 1930 FIGA Patented July 14, 1931 PATENT OFFICE kJAMES EVER-ETTSTEINBERG, OF OKLAHOMA CITY, OKLAHOMA TELEPHONE TRANSMITTER SILENCERApplication filed July 28,

My invention relates to a silencer for telephone transmitters. Y

The objects of my invention are to provide a device ofpthis classv whichis new, novel, practical and of utility; which will be eX- t-remelysimple in construction; which may be easily and quickly attached to anytelephone transmitter without change in the transmitter; which will becheap in manufacture; which will be neatvand pleasing in appearance;which will be positive in action; which will eliminate noises within aIroom from entering the transmitter in the room and being conveyed to thereceiver of the l5 Same telephone; which will have exterior projections,any of which will act to silence the transmitter; and, which will beeiicient in accomplishing all the purposes for which it is intended.

Many times at the present, it is rendered diiicult to hear a party atthe other end of a. telephone line due to the fact that noises in thereceiving room are conveyed through the transmitter to the receiver inthe room. Applicants device is designed to prevent this difficulty. Itis also designed so that it may be operated by a person with the handwhich is holding the receiver or with the hand which is holding thetelephone.

With these and other objects in view as will more fully appear, myinvention consists in the construction, novel features and combinationof parts hereinafter more fully described, pointed out in the claimshereto appended, and illustrated in theaccompanying one-sheet drawing,of which,

Figure 1 is a fragmentary elevational view of the front cap of thedevice;

Fig. 2 is an elevational'view of the device with the cap removed.

Fig. '3 is an elevational sectional view through the device installedupon a usual telephone transmitter.

Fig. 4 is a plane view of a portion of the device showing itsdevelopment;

Fig. 5 is a perspective view of the portion of the device shown in Fig.4 after it has been formed; and,

Fig. 6 is a perspective view of one of the diaphragm contacting members.

Serial No., 471,126.

Like characters of reference designate like parts'in all the figures.

It is understood that various changes in the form, proportion, size,shape, Weight and other details of construction, within the scope of myinvention may be resorted to without departing from the spirit or broadprinciple of my invention and without sacrificing any of the advantagesthereof; and it is also understood that the drawings are to beinterpreted as being illustrative and not restrictive.

One practical embodiment of the invention as illustrated in the drawingscomprises:

A vcup shaped member 1 having an annular exteriorly threaded flange 2upon its front face, and havingr an exteriorly threaded projection 3upon its back 4. Said back 4 is provided with a bore or perforation 5which extends from the interior ot said member outwardly through saidprojection 3. Said perforation 5 is not circular` in form but is formedby two wing shaped apertures 6 and 7 between which hemisphericalprojections 8 are located. Said projections 8 are each bored as shown at9.

A substantially U-shaped member 10 having downstanding legs 11 and across-member 12, and having a pair of upstanding parallel strap members13 located upon said'A cross-member 12 is provided with legs 11extending into and through said perforations 9 in said projections 8.Said strap members 1.53 are each alinedly perforated as shown at 14 andsaid legs 11 are formed with hollow cylindrical sockets 15 at the lowerend of each. Said sockets 15 are each adapted to rigidly embrace adiaphragm contacting member 16` best shown in Fig. 6. Said member 16will preferably be made of some resilient sub-4 stance such as rubber orthe like and will be attached within said socket 15 in any usual mannersuch as gluing or cementing. As may best be seen in Fig. 3 said member10 extends slightly outward through the cavity of said cup shapedmember 1. Said member 10 is provided as a means for causing said members16 to selectively Contact a usual d iaphragm 17 of a usual telephonetransmitter 18. As a means for actuating said member 10 to move forwardor away from said diaphragm 17, I provide a rod 19 which extendstransversely through alined perforations 20 in opposite sides of saidcup shaped member 1. Said rod 20 is a length sufficient to extendslightly past the periphery of said member 1 on each of its sidesand'centrally is flattened as shown at 21. Said fiattened portion 21extends between said strap members 13 of member 10 and is providedcentrally with a transverse slot 22. Said slot 22 is not a straight slotbut has its central portion nearer that edge of said flat portion 21Vwhich is most remote from portion 12 of said member 10. A pin 23 isprovided through said perfor/ations 14 in members 13 and also throughslot 22 and theends of said pin 23 rest snugly. yet movably within slots24 in a web 25 which isprovided integrally acro said cup shapedmember 1. Transverse pins 26 which preventthe longitudinal movement ofsaid pin 23 in said perforation 14 and said slot 22 are providedythrough said pin 23.

i Said rod 19 is further provided adjacent each end of said fiat portion21 with transverse pins 27 against which is placed washers 28 which actas a means for seating one end of a compression spring 29,V the otherend of whichv bears. against the interior wall of'said member 1. Aplurally perforatedv cap 30 having.rk an interiorly threaded annularflange 31 is threadedly disposed upon said flange 2 of said member 1 forforming a cover tothe cup shaped member 1. A screen 32 is providedbetween said flange 2' and said cap 30 over the entire inside faceofsaid cap 30.

The assembly of the device is described as follows: f

yContact member y16 will? be dipped in glue or some cementatioussubstance and placed in socket 15 of legs 11 of said member 10. Saidlegs 11 will then be inserted within said perforations 9. Pins 27 andwashers 28 and springs 29'will be installed upon said rod 19. One end ofrod 19 will be inserted through one of the alined perforations inthefside of mid member 1 until the other end of the vrod may be slippedVinto the cup shaped member and then slid outwardl through the other oneyof said alined' per orations. This Will bring'said parallel stripmembers 13 into position to embrace the flat portion 21 of said 4rod 19.Pin 23 will thenbe insertedthrough perforations 14 andthrough said slot22,.and the transverse pins 26 will be installed. yThis will bring saidpin 23 to rest within said slots 24 in said web 25. Cap 30 will thenreceive saidscreen 32 after whichl it will be threaded upon flange 2 ofsaidY member 1. Thisy will complete they assembly of the device.

In installing the device upon transmitter 1.8, the usual mouth piece ofthe transmitter will be removed and projection 3 will be threaded intothe Vusual opening thereof. This will complete' the installationv of:the device. In operation manual pressure exerted upon either end of saidrod 19 will cause said member 10 to be forced into contact with saiddiaphragm 17 by the action of said slot 22 upon said pin 23. Said slot24 in web 25 will prevent any transverse movement of said pn.23,.butwill permit themovement of said pintoward or away from said diaphragm17. When said members 16 are forced intocontact with said diaphragm 17the vibration of the diaphragm due to soundsin the room will be stopped.Consequently the diaphragm will not act to transmit any sound whatever.

Obviously, the invention is susceptible of embodiment in forms otherthan that which is illustrated inthe accompanying. drawings anddescribed herein, and applicable for uses andpurposes other than asdetailedand I therefore consider as my own all. such modi- .cations andadaptations and other usesof the form of the deviceherein described asfairly fall within the scope of my invention. Y Y

, Having thus described my invention, what isclaimed and desired to'besecurediby` Letters Patent,.is: Y

1'. A transmitterl silencer embodying open faced cupshaped memberhaving` an -aperture'through its rear wall, said wall adaptedto connectthe diaphragm casing` of a sound transmitter,.a transverse rod.extending. throughr and projecting outwardlyy from said member, andmeans, for contacting the transmitter diaphragm upon longitudinalmovement of said rod.

2.n A. transmitterV silencer embodying an open faced cup-shaped memberhaving an aperture throughl its rear wall, said wall adapted to connectthe diaphragm casing of a sound-transmitter, a transverse rod extendingthrough and projecting outwardly fromV said member, a plurallyperforated cap'` for saidopen face, andmeans for contacting thetransmitter diaphragm upon longitudinal movement of said rod'.

3.A transmitter silencer embodying an@ open faced cup-shaped memberhaving an aperture through its rear wall said wall adapted to connectthe diaphragmcssing; of

a sound transmitter, a transverse rod extendmg through and'r projectingoutwardiy freinv rear Wall of said'cup-shaped member and" having its legconnecting member slidably engaging a deformed slot in'said transverserod.

Organization as described in claim 3, in which said holdingfmeanslcomprises a. transverse pin through said rod, a washer and a compressionspring adjacent each end portion of said rod and Within said cup shapedmember, one end of each of said springs seated upon one of said Washers,their other ends bearing against the inner wall of said cupshapedmember.

JAMES EVERETT STEINBERG.

